Printer s proof



(No Model.)

B. F. JACOBS.

, PRINTER'STROOF PRESS. No. 271,468. Patented J an.30,1883.

INVENTUR.

"a fWZ-m tlwrreo STATES PATENT FFEQE PRINTERS PROOF=PRESS.

SPECIFICATION forming part of Letters Patent No. 271,468, dated January 30, 1883.

Application filed June 24, 1882. (No model.)

To all whom it may concern:

Be it known that I, BENJAMIN FRANKLIN JACOBS, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a newand useful Proof-Press for Printers, of which the following is a specification.

My invention relates to improvements in printers"proof-presses; and the objects of my invention are, first, to provide a proof-press for printers use of such construction that the proofs can be easily and rapidly taken; and,

second, to afford facilities for the proper ad-.

justment of the proof-roller, so that the type will not be bruised or injured by passing the impression-roller over the faces thereof. l attain these objects by the mechanism illustrated in the accompanying drawings, in which---- Figure 1 is a side elevation of myimproved proof-press. Fig. 2 is an end view, partly in section. Fig. 3 is a perspective view of one of the shoes.

Similar letters refer to similarpartsthroughout the several views. I

The table orbed-plate A is mounted upon suitable legs, B B, and supports and carries the proof-roller and its operating mechanism.

The proof-roller C is journaled in suitable bearings, D, situated at the upper end of the carriage or traveling frame E, which has slots F F cut in the upright portions thereof.

The under side of the bed-plate A is provided with two parallel \l-shaped projecting ribs or rails, G G, which form a track or guides upon which is slid a plate, ll, having grooves near either end,which conform to the ribs G. This plate H has two downwardly-projecting lugs, H, which form a bearing for the shaft I, carrying the toothed or gear wheels J J, which mesh into the racks K K, firmly secured upon the under side of the bed-plate. The gearwheels J J are placed between the uprights of the carrier, and their hubs L are of such a diameter as to snugly fit (without friction or binding) within the vertical slots F, cut in said uprights, and have vertical play therein. One or both ends of the shaft carrying the said gear-wheels may be made square to receive a removable crank-handle, M, by means of which the machine is operated.

To the under side of the traveling guideplate H are securelyattaehed, near each corner, the downwardly-projecting bolts or pins N, which enter and pass through holes bored in a lower or tension plate, 0. The pins N are surrounded by a coiled expansion-spring, P, as clearly shown in Fig. 2. The tension-plate O has a rib formed on its under side to strengthen it and has aprojecting lug or rabbet at each end, which closely fits within the slotor groove F in the carriage and rests upon the upper ends ofthe set or thumb screws Q Q, which pass upward through the base of the carriage,,as shown.

The galley plate or table A is provided with parallel grooves or track R, in which are placed shoes S S, the upper faces of which are beveled ott' toward both ends, and they also have upon their under side a rib, a, which enters the groove formed by each set of rails or tracks R It, andin order that the shoes upon opposite sides of the table may be placed directly 0pposite to each other and at an equal distance from the end of the table, I drill a series of holes, I), in the bottom of the groove formed in the tracks R R. The said holes I) receive a downwardly prqjecting pin, 0, formed upon the shoes S S, and by this means the exact distance of the shoes from the end of the table can be easily regulated. It will be readily seen that by thus constructing the shoes and .rendering them capable of being moved along in the tracks or grooves on the table at both sides ot'the carriage or roller frame the impression or proof roller will mount the inclined faces of the shoes and be elevated just sufficient to pass over the first series of types at either end of the galley or form,aiid not bruise the contents of the galley either in mounting or passing off at the opposite end thereof. While this step isbeing taken the carriage E and plate 0 will be carried upward, thereby compressing the springs P P, and impart an upward yieldingand at the same timeadownward pressure of the parts of sufficient force and character to take the impression without injuring the types. The extent or degree of this pressure is governed by the thumb-screws Q Q, which are operated to cause the plate 0 to press or bear with greater or less force against the springs P, placed between the said IOO plate and the guide-plate H. By this means, i

during the operation a sufficient upward press- 1 and operating substantially in the manner and ure is had to press the gear-Wheels J J steadily against the rack K on the under side of the table along which they are caused to move.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. In combination with the galley plate or table A of a printers proof-press, the proofroller G, carriage E, guide-plate I1, shaft I, carrying gear-Wheels J J, meshing with racks K springs I P, tension- 0 all constructed, ar-

K, pins N, expansive plate 0, and set-screws ranged, and operating substantially as and for the purpose set forth.

2. The combination, with the proof-roller O, of the carriage E, guide-plate Il, springs I? I, tension-plate O, and set screws QQ, arranged l v i y for the purpose set forth.

3. In aprinters proof-press, the galley plate or table A, having raised tracks It It at each side thereof, and provided with an impressionroller traveling upon said tracks, in combination with the double-inclined shoes S S, constructed and arranged to operate substantiall in the manner and for the purpose set forth and specified.

In testimony that, I claim the foregoing I have hereunto set my hand this 12th day of June, 1882.

BENJAMIN FRANKLIN JACOBS.

Witnesses:

(Inns. E. KELLY, \VILMER BRADFORD. 

